@charset "UTF-8";

:root {
  --bg: #121a2e;
  --bg-2: #0e1526;
  --panel: #182238;
  --panel-2: #1d2942;
  --line: #2b3855;
  --ink: #f3f1ea;
  --muted: #98a3bd;
  --amber: #ffb347;
  --amber-soft: rgba(255, 179, 71, .14);
  --shell: 1180px;
  --header-height: 70px;
  --mono: "JetBrains Mono", Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 18px); }
body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
svg { display: block; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--amber); outline-offset: 4px; }
.page-shell { width: min(calc(100% - 48px), var(--shell)); margin: 0 auto; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  color: var(--amber);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.4px;
  line-height: 1.4;
}
.eyebrow::before { width: 16px; height: 2px; content: ""; background: currentColor; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(18, 26, 46, .94);
  backdrop-filter: blur(14px);
}
.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 48px), var(--shell));
  min-height: var(--header-height);
  margin: 0 auto;
  gap: 20px;
}
.brand { display: inline-flex; align-items: center; flex: none; gap: 10px; font-size: 21px; font-weight: 900; letter-spacing: .2px; }
.brand img { width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 50%; object-fit: contain; background: #0d1526; }
.brand-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 19px;
  height: 19px;
  border-radius: 50%;
  background: var(--amber);
  color: #22180a;
  font-family: var(--mono);
  font-size: 10px;
  font-style: normal;
  font-weight: 900;
}
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(12px, 1.9vw, 25px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 7px 0; border-bottom: 2px solid transparent; color: #a9b6d1; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { border-bottom-color: var(--amber); color: #fff; }
.nav-actions { display: flex; align-items: center; flex: none; gap: 10px; }
.nav-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  gap: 8px;
  padding: 0 18px;
  border: 1px solid var(--amber);
  border-radius: 999px;
  background: var(--amber);
  color: #22180a;
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
  transition: background .18s ease, color .18s ease;
}
.nav-download:hover { background: transparent; color: var(--amber); }
.nav-download svg, .button svg { width: 18px; height: 18px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 0; border: 1px solid var(--line); border-radius: 50%; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; width: 18px; height: 2px; margin: 5px auto; background: var(--ink); transition: transform .18s ease; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* hero: night skyline + center bubbles + mood strip */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(560px 320px at 50% -8%, rgba(255, 179, 71, .18), transparent 72%),
    radial-gradient(420px 260px at 8% 44%, rgba(84, 112, 190, .16), transparent 70%),
    linear-gradient(180deg, #0c1324 0%, var(--bg) 78%);
}
.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background-image: radial-gradient(rgba(255, 255, 255, .35) 1px, transparent 1px);
  background-size: 92px 92px;
  opacity: .18;
  mask-image: linear-gradient(180deg, #000, transparent 74%);
  pointer-events: none;
}
.skyline {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1;
  display: flex;
  align-items: flex-end;
  height: 250px;
  gap: 1.6%;
  padding: 0 2%;
  pointer-events: none;
  opacity: .85;
  mask-image: linear-gradient(180deg, transparent 0%, transparent 46%, #000 88%);
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, transparent 46%, #000 88%);
}
.skyline i {
  position: relative;
  flex: 1 1 0;
  border-top: 2px solid rgba(255, 179, 71, .3);
  background:
    repeating-linear-gradient(90deg, rgba(255, 179, 71, .2) 0 3px, transparent 3px 13px),
    repeating-linear-gradient(0deg, rgba(255, 179, 71, .13) 0 3px, transparent 3px 17px),
    linear-gradient(180deg, #1a2540, #0a1020);
}
.skyline i:nth-child(1) { height: 42%; }
.skyline i:nth-child(2) { height: 66%; }
.skyline i:nth-child(3) { height: 34%; }
.skyline i:nth-child(4) { height: 78%; }
.skyline i:nth-child(5) { height: 52%; }
.skyline i:nth-child(6) { height: 88%; }
.skyline i:nth-child(7) { height: 46%; }
.skyline i:nth-child(8) { height: 62%; }
.skyline i:nth-child(9) { height: 38%; }
.skyline i:nth-child(10) { height: 58%; }
.skyline i::after {
  position: absolute;
  top: -7px;
  right: 22%;
  width: 2px;
  height: 7px;
  content: "";
  background: var(--amber);
  opacity: .55;
}

.hero-shell { position: relative; z-index: 2; }
.hero-inner { max-width: 700px; padding: 58px 0 10px; margin: 0 auto; text-align: center; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: #b2bdd6;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 1.6px;
}
.hero-kicker b {
  padding: 3px 8px;
  border-radius: 3px;
  background: var(--amber);
  color: #22180a;
  font-size: 9.5px;
  font-weight: 900;
  letter-spacing: 1.2px;
}
.hero h1 {
  margin: 0;
  color: #fff;
  font-size: clamp(60px, 9vw, 118px);
  font-weight: 900;
  letter-spacing: clamp(-2px, -.5vw, -5px);
  line-height: .92;
  text-shadow: 0 18px 60px rgba(255, 179, 71, .18);
}
.hero-subtitle {
  margin: 18px 0 0;
  color: var(--amber);
  font-size: clamp(18px, 2.1vw, 24px);
  font-weight: 800;
  line-height: 1.4;
}
.hero-lead { max-width: 540px; margin: 12px auto 0; color: var(--muted); font-size: 14.5px; }

.chat-stage { max-width: 520px; margin: 28px auto 0; text-align: left; }
.bubble {
  position: relative;
  width: fit-content;
  max-width: 84%;
  padding: 12px 17px;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
}
.bubble-out {
  margin-left: auto;
  border-radius: 16px 16px 4px 16px;
  background: var(--amber);
  color: #241806;
  font-weight: 700;
  box-shadow: 0 12px 26px rgba(255, 179, 71, .2);
}
.bubble-in {
  margin-top: 10px;
  border: 1px solid var(--line);
  border-radius: 16px 16px 16px 4px;
  background: rgba(24, 34, 56, .92);
  color: #e6e9f2;
}
.chat-tag { display: flex; align-items: baseline; justify-content: flex-end; gap: 8px; margin: 10px 0 0; color: var(--amber); font-family: var(--mono); font-size: 10.5px; letter-spacing: .4px; }
.chat-tag small { color: #7c88a5; font-family: inherit; font-size: 9.5px; }

.hero-actions { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 20px; margin-top: 26px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  gap: 14px;
  padding: 0 28px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 900;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.button-primary { background: var(--amber); color: #22180a; box-shadow: 0 14px 30px rgba(255, 179, 71, .22); }
.button-primary:hover { background: #ffc470; transform: translateY(-2px); }
.button-large { min-height: 54px; padding: 0 34px; font-size: 15px; }
.text-link { color: #c6cfe3; border-bottom: 1px dashed #4b5878; font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 5px; color: var(--amber); }

.hero-billboard {
  position: absolute;
  top: 54px;
  right: 0;
  z-index: 3;
  width: 158px;
  margin: 0;
  padding: 6px;
  border: 1px solid rgba(255, 179, 71, .4);
  border-radius: 14px;
  background: rgba(12, 19, 36, .9);
  box-shadow: 0 0 46px rgba(255, 179, 71, .2);
  transform: rotate(5deg);
}
.hero-billboard img { width: 100%; height: auto; aspect-ratio: 9 / 16; border-radius: 9px; object-fit: cover; object-position: center top; }
.hero-billboard figcaption { padding: 5px 2px 1px; color: #b9a888; font-family: var(--mono); font-size: 9px; letter-spacing: .6px; text-align: center; }

.mood-strip {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: 1.6fr repeat(6, minmax(0, 1fr));
  gap: 7px;
  padding: 26px 0 34px;
  margin: 0;
  list-style: none;
}
.mood-strip li {
  padding: 11px 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(20, 30, 50, .82);
  font-size: 12.5px;
  font-weight: 700;
  text-align: center;
}
.mood-strip .mood-label { display: flex; align-items: center; justify-content: flex-start; padding-left: 15px; border-style: dashed; color: #8794b0; font-family: var(--mono); font-size: 10.5px; letter-spacing: 1px; }
.mood-strip .is-picked { border-color: transparent; background: var(--amber); color: #22180a; box-shadow: 0 8px 20px rgba(255, 179, 71, .25); }

/* features: four across */
.features { padding: 76px 0 82px; border-bottom: 1px solid var(--line); background: var(--bg-2); }
.section-heading { margin-bottom: 32px; }
.section-heading h2, .download h2 { margin: 0; font-size: clamp(25px, 2.9vw, 36px); font-weight: 900; letter-spacing: -.9px; line-height: 1.3; }
.section-heading > p:last-child { max-width: 620px; margin: 12px 0 0; color: var(--muted); font-size: 14px; }
.section-heading-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(210px, 300px); align-items: end; gap: 28px; }
.section-heading-split > p:last-child { margin: 0 0 5px; }
.feature-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.feature-card {
  position: relative;
  padding: 26px 20px 24px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: linear-gradient(160deg, rgba(255, 179, 71, .08), transparent 52%), var(--panel);
}
.feature-no {
  display: block;
  margin-bottom: 14px;
  color: var(--amber);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.6px;
}
.feature-card h3 { margin: 0 0 8px; font-size: 17px; font-weight: 900; }
.feature-card p { margin: 0; color: var(--muted); font-size: 12.8px; line-height: 1.85; }

/* shots: four across */
.shots { padding: 76px 0 84px; }
.shot-row { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; align-items: start; }
.shot-card { margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
.shot-card img { width: 100%; height: auto; aspect-ratio: 9 / 16; object-fit: cover; object-position: center top; }
.shot-card figcaption { padding: 10px 12px 12px; border-top: 1px solid var(--line); }
.shot-card figcaption b { display: block; color: var(--amber); font-family: var(--mono); font-size: 9.5px; letter-spacing: 1px; }
.shot-card figcaption span { display: block; margin-top: 3px; font-size: 13px; font-weight: 800; line-height: 1.4; }
.shot-card figcaption small { display: block; color: var(--muted); font-size: 10px; font-weight: 400; }

/* faq: full width stacked list */
.faq { padding: 74px 0 80px; border-top: 1px solid var(--line); background: var(--bg-2); }
.faq-heading { display: grid; grid-template-columns: minmax(0, 1fr) minmax(200px, 280px); align-items: end; gap: 24px; }
.faq-heading > p:last-child { margin: 0 0 6px; }
.faq-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 34px; border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 0;
  cursor: pointer;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary h3 { margin: 0; font-size: 15px; font-weight: 900; }
.faq-list summary i { position: relative; flex: none; width: 22px; height: 22px; border: 1px solid var(--line); border-radius: 50%; }
.faq-list summary i::before,
.faq-list summary i::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 9px;
  height: 1.5px;
  content: "";
  background: var(--amber);
  transform: translate(-50%, -50%);
}
.faq-list summary i::after { transform: translate(-50%, -50%) rotate(90deg); transition: transform .2s ease; }
.faq-list details[open] summary i::after { transform: translate(-50%, -50%) rotate(0); }
.faq-list details p { padding: 0 26px 17px 0; margin: 0; color: var(--muted); font-size: 13.2px; line-height: 1.85; }

/* reviews: single column */
.reviews { padding: 76px 0 82px; }
.review-list { display: grid; gap: 10px; padding: 0; margin: 0; list-style: none; }
.review-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 170px;
  align-items: center;
  gap: 6px 20px;
  padding: 16px 22px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  border-radius: 4px;
  background: var(--panel);
}
.review-meta { display: contents; }
.review-meta b { order: 2; align-self: start; color: var(--amber); font-size: 12.5px; font-weight: 900; text-align: right; }
.review-meta time { order: 3; color: #77839f; font-family: var(--mono); font-size: 10px; text-align: right; }
.review-card p { grid-row: 1 / span 2; margin: 0; color: #bcc6dc; font-size: 13px; line-height: 1.8; }

/* steps: vertical rail */
.steps { padding: 72px 0 78px; border-top: 1px solid var(--line); background: var(--bg-2); }
.step-list { display: grid; gap: 0; padding: 0; margin: 0; list-style: none; }
.step-list li { position: relative; display: grid; grid-template-columns: 76px minmax(0, 1fr); gap: 18px; padding: 22px 0 22px 4px; border-top: 1px solid var(--line); }
.step-list li::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 26px;
  width: 1px;
  content: "";
  background: linear-gradient(180deg, var(--amber), transparent);
  opacity: .35;
}
.step-list li:last-child { border-bottom: 1px solid var(--line); }
.step-list span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(255, 179, 71, .45);
  border-radius: 50%;
  background: var(--bg-2);
  color: var(--amber);
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
}
.step-list h3 { margin: 6px 0 5px; font-size: 17px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

/* download */
.download { padding: 30px 0 34px; }
.download-inner {
  padding: 50px clamp(24px, 5vw, 60px) 44px;
  border: 1px solid rgba(255, 179, 71, .35);
  border-radius: 12px;
  background:
    radial-gradient(460px 240px at 92% 0%, rgba(255, 179, 71, .22), transparent 70%),
    linear-gradient(140deg, #1b2740, #121a2e 72%);
}
.download h2 { max-width: 620px; }
.download-inner > p { max-width: 520px; margin: 13px 0 24px; color: var(--muted); font-size: 14px; }
.download-notes { display: flex; flex-wrap: wrap; gap: 8px 22px; padding: 22px 0 0; margin: 28px 0 0; border-top: 1px solid var(--line); list-style: none; }
.download-notes li { color: #8e9ab4; font-family: var(--mono); font-size: 11px; }
.download-notes li::before { margin-right: 8px; content: "◍"; color: var(--amber); }

/* footer */
.site-footer { padding: 44px 0 52px; border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 20px 40px; align-items: start; }
.footer-brand strong { font-size: 18px; font-weight: 900; }
.footer-brand p { margin: 4px 0 0; color: var(--muted); font-size: 12px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.footer-nav a { color: #b7c1d8; font-size: 12px; }
.footer-nav a:hover { color: var(--amber); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.footer-meta p { margin: 0; }
.footer-meta a { color: var(--muted); }
.disclaimer { grid-column: 1 / -1; margin: 0; color: #77839f; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1100px) {
  .hero-billboard { display: none; }
}
@media (max-width: 1024px) {
  .feature-grid, .shot-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .faq-list { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
  .menu-toggle { display: block; }
  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    padding: 8px 24px 16px;
    border-bottom: 1px solid var(--line);
    background: var(--bg);
    box-shadow: 0 16px 26px rgba(0, 0, 0, .5);
  }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .primary-nav a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .hero-inner { padding-top: 46px; }
  .mood-strip { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .mood-strip .mood-label { grid-column: 1 / -1; justify-content: center; padding-left: 0; }
  .review-card { grid-template-columns: 1fr; }
  .review-meta { display: flex; align-items: baseline; justify-content: space-between; order: 0; }
  .review-meta b { text-align: left; }
  .review-card p { grid-row: auto; }
  .faq-heading { grid-template-columns: 1fr; gap: 8px; }
  .faq-heading > p:last-child { margin: 0; }
}
@media (max-width: 600px) {
  .page-shell, .nav-shell { width: calc(100% - 32px); }
  .hero h1 { font-size: clamp(52px, 17vw, 72px); }
  .hero-lead { font-size: 14px; }
  .bubble { max-width: 92%; }
  .mood-strip { padding-bottom: 28px; }
  .feature-grid, .shot-row { grid-template-columns: 1fr; }
  .shot-row { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .section-heading-split { grid-template-columns: 1fr; gap: 10px; }
  .section-heading-split > p:last-child { margin: 0; }
  .step-list li { grid-template-columns: 58px minmax(0, 1fr); gap: 12px; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .brand { font-size: 17px; gap: 7px; }
  .brand img { width: 30px; height: 30px; }
  .brand-tag { display: none; }
  .nav-actions { gap: 8px; }
  .nav-download { min-height: 34px; padding: 0 10px; font-size: 11px; gap: 5px; }
  .nav-download svg { width: 14px; height: 14px; }
  .menu-toggle { width: 34px; height: 34px; }
  .hero h1 { font-size: 46px; }
  .hero-subtitle { font-size: 16px; }
  .button { width: 100%; }
  .mood-strip { gap: 5px; }
  .mood-strip li { padding: 9px 3px; font-size: 11px; }
}